A theoretical model describes a sandwich cylindrical microshell with piezoelectric faces, a graphene-reinforced TPMS core, internal fluid, and hygrothermal loading. Parametric results suggest stiffer topology, surface-biased graphene, higher flow velocity, and uniform porosity increase resonance and peak voltage, while heat and moisture soften the structure. No prototype or experiment was reported.
Key findings
- Parametric analysis indicated that stiffer TPMS topology, surface-biased graphene distribution, higher internal-flow velocity, and uniform porosity raise resonance frequency and peak harvested voltage. Greater hygrothermal loading reduced dynamic stability and shifted operation to lower frequencies.
Why this matters globally
Closed-form analysis may screen sensor or micro-harvester designs before finite-element work and prototyping, but does not establish net power, durability, or manufacturability.
Thai researcher contribution
Chulalongkorn University and Thammasat structural-engineering researchers collaborated with the University of Queensland on a multiphysics electromechanical model.
Limitations to consider
This analytical model depends on material, boundary, steady-flow, and foundation assumptions. The abstract reports no experiment, finite-element benchmark, or parameter uncertainty. Higher resonance or voltage does not equal usable net energy after circuitry and load.